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(No Model.) 4 sheets-sheet- 1. N. H. SUREN.

KEYLESS FIRE ALARM TELEGRAPH BOX. No. 562,153. D Patented Dec. 31-, 1895.

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No. 552,153. I Patented Dec. 31, 1895.

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NO. 552,153. Patented Dec. 31, 1895.

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ANDREW B GHANA (No Model.) 4 Sheets-Sheet 4.

N..H.SURENL KEYLBSS FIRE ALARM TELEGRAPH BOX. No. 552,153. Patented Dec. 31', 1895.

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Nirnn STATES 'ATENT Erica.

NATHAN H. SUREN, OF NEW YORK, N. Y., ASSIGNOR TO THE GAMEVVELL FIRE-ALARM TELEGRAPH COMPANY, OF SAME PLACE.

KEYLESS'FlRE-ALARM-TELEGRAPH B OX.

SPECIFICATION forming part of Letters Patent No. 552,153, dated December 31, 1895.

Application filed March 8, 1895. Serial No. 540,945. (No model.) i

T ctZZ whom it may concern: A further object is to provide a mechanism Be it known that I, NATHAN H. SUREN, a which will be simple in construction and abcitizen of the United States, residing at New solutely certain in operation. York city, in the county and State of New A still further object is to provide boxes of 55 5 York, have invented a certain new and usethis character with means for operating the ful Improvement in Keyless Fire-Alarm-'1elecut-out switch by the handle mechanism, as graph Boxes, of which the following is a speciwell as for operating the non-interference defication. '-vices, and to do this in a proper sequence so Heretofore keyless fire alarm telegraph that the cut-out switch will be shifted, turn- 6o boxes have been constructed in which the ing current into the box and energizing the turning of the handle mechanically operates non-interference magnet before the armature an alarm-bell at the box, attracting attention of that magnet is released. to the fact that the box is being operated, The invention consists in the several def and at the same time unlocks the door of the vices and combinations of parts hereinafter 6 5 1 5 box so that the box can be pulled by the opdescribed, and more particularly set forth in erator. Keyless boxes have also been conthe claims. structed in which the turning of the handle, In the accompanying drawings, forming a instead of unlocking the door, pulls the hook part hereof, Figure l is a view of the box with of the box and also mechanically operates an the door open, showing the inside of the outer 7o 2o alarm at the box, attracting attention. The door which carries the mechanism operated latter boxes have also been provided with a by the handle. Fig. 2 is a View of the handevice operated by the handle which withdle-operated mechanism from the inner side draws the stud holding the armature of the of the door with the face-plate shown in dotted non-interfering magnet in the field of the lines to disclose the mechanism. Fig. 3 is a 7 5 magnet, this withdrawal of the stud releasview from the other side of the mecha'nism ing the armature a suflicient length of time i. 6., the side toward the front of the boxin advance of the pulling of the hook to make with the retaining-plate shown in dotted lines it certain that the box will be disabled by the and the handle-shaft in section. Fig. 4 is a breaking of the circuit by another box alsection on line 4 4.- of Fig. 3. Figs. 5 and 6 8o ready in operation. In both classes of boxes are plan views showing other positions of the referred to the alarm-bell operates continuoperating-dogs. Fig. 7 is aview of the inside ously during the turning of the handle, the of the outer door of the box with the, spring pallet-wheel which works the bell-hammer .mechanism and bell removed, showing the being turned in one direction by the operator cam and levers for operating the non-interfer- 85 3 5 against the tension of a spring which turns ing and switch studs. Fig. 8 is a view showboth the handle and the pallet-wheel backing the cam which operates the non-interferward to the position of rest. Thus the alarmingand switch studs moved to withdraw such bell begins to ring the minute the handle is studs; and Figs. 9 and 10 are sections disclosmoved. These boxes have been objectioning the bell-crank levers which are directly 9o 40 able for the reason that the operator freconnected with the switch and non-interferquently fails to turn the handle far enough to ing studs, respectively.

open the door or pull the hook of the box, A is the outer box, having a doorA, which thinking when he hears the box-alarm sound is made as a shell of some depth to receive that the box has been set in operation. the mechanism operated by the handle and 5 '45 The object of my invention is'to improve is locked by a key in the manner common boxes of this character by so constructing the with keyless boxes which pull the hook by mechanism that the local or box alarm will the movement of the handle. The inner box W not sound until the handle has been turned B is closed by: a door Band contains the far enough to trip the mechanism and set it usual apparatus. The hook a, by pulling I00 in operation beyond the further control of the which the box is set in operation to transmit an alarm to the central office, projectsthrough operator.

the door B of the inner box. Openings a, a in the door B give access to studs which control the non-interference armature and the cut-out switch, as will be well understood. These devices are ordinarily operated by studs on the inner side of the door of the outer box, which studs, by the closing of the door, enter the holes a a and push inwardly the plungers within the inner box, and by the opening of the door release the plungers within the inner box. These devices require no further description, because they are of the ordinary construction which is employed in what are known as the standard Gardiner boxes manufactured and sold by the Gamewell Fire-Alarm Telegraph Company. It is only necessary to mention them because the mechanism which embodies my invention is provided with a latch which operates the pull-hook a and with studs which are projected into and withdrawn from the openings a a to operate the non-interfering and cutout devices without opening the door of the box and simulating in their movement the studs upon the outer door of the standard key-boxes, which door has to be opened before the box can be pulled.

I will first describe the devices for operating the non-interferin g and switch studs with reference particularly to Figs. 7, S, 9. and 10. The handle (shown in dotted lines in Fig. 7) is secured to the end of a shaft 0, which projects through the outer door A. Upon this shaft on the inner side of the door A and close to the shell of the door is fixed a cam 0 whose movement is limited by stops 1) b. A spring'D is connected by a chain with a pin on the cam near its periphery and returns the cam, together with the shaft and the handle, to the position of rest shown in Fig. 7. The other position of the parts is shown in Fig. 8, this being the position which the parts assume when the handle is turned by the operator one-third of a revolution, which is permitted by the stops 1) b.

E E are levers which are pivoted at the point 0, and have at their inner ends rollers resting against the periphery of the cam O.

These levers are returned to their normal position by springs 0 0 The outer ends of the levers are connected by links with bell-cranks E E which are connected at their other ends with the non-interfering and switch studs F F, which move back and forth in suitable guiding-sleeves (1 cl. It will be seen that the leverE bears upon the cam O in advance of the lever E so that in the forward turning movement of the cam the lever E will first ride over the point e of the cam and the switchstud F will be drawn inwardly before .the lever E, which moves the non-interference stud F, comes in contact with the forcing surface of the cam. By this means it is made certain that the switch-stud will first be withdrawn, shifting the cut-out switch and throwing the non-interfering magnet into circuit before the armature of the non-interfering magnet is released by the withdrawing of the non-interfering stud.

The bell-ringing and hook-operating mech anism is confined between a face-plate G and back plate G, and is placed in the cover A from the inner side, covering the cam and levers which have been described and which lie close to the shell of the cover.

H is a sleeve set between the plates G G and having reduced ends which pass through such plates. The handle shaft 0 passes through this sleeve and is free to rotate therein. Upon the sleeve II is mounted a cogwheel I, which is loose upon the sleeve and is retained in position thereon by a retainingplatef engaging with a groove f in the sleeve H. Between the face of the cog-wheelI and the plate G is an arm J, which is rigidly secured to the sleeve H. The main spring K is located between the cog-wheel I and the back plate G. This spring is secured at its inner end to the sleeve H and at its outer end to a stud projecting inwardly from the back plate G. The spring K is placed under a strong initial tension. The pallet-wheel L is geared by a pinion g with the cog-wheel I and operates a pallet L, which carries the bell-hammer M acting, when oscillated, to strike the bell M. A pawl h engages the teeth of the cog-wheel I and permits the movement of that wheel only in one directiont'. 6., in the direction. in which it is driven by the main spring Kas will be presently explained. The cog-wheel I is provided with three ratchetshoulders 'i on its face which are formed of steel pins passing through the cog-wheel.

N is a square-end pawl carried. by the arm J and engaging the ratchet-shoulders 2'. This pawl is thrown outwardly by a light' spring j and is provided with a tailpiece j for a purpose to be presently explained.

The end of thehandle-shaft G where it projects beyond the face-plate G is squared and is provided with an arm which turns with the handle-shaft. Upon the under side of this arm is pivoted a dog 0 having a hookshaped end engaging the tailpiece j of the pawl N, and also provided with an extension on the other side of its pivot which strikes against a spring Z in the position of rest of the parts. A pin m on the face -plate G limits the movement of the arm 70 which carries the dog 0.

P is a stop which is pivoted to the face-plate G and carries at its free end a rounded hub extending inwardly close to the face of the cogwheel I and engaging with the ratchet-shoulders 2' on said cog-wheel, holding the same inthe position of rest of the parts. The arm J also strikes the stop P and is arrested by said stop, limiting the movement of the arm in the direction in which it is driven by the main spring. The normal position of the parts is that shown in Fig. 2, the dog 0 being locked to the pawl N, and the stop P being jammed between the arm J and one of the ratchetshoulders z'. The initial tension of the main spring K being exerted upon the arm J and:

pawl N, both the arm J and the ratchet-shoulder '5, with which the pawl N is in engagement, are pressed firmly against the rounded end of the stop P. The turning of the handle by the operator throws the arm 7.; carrying the dog 0 around to the left. The dog 0 being locked to the pawl N, the dog 0 carries the pawl N with it around to the left, thereby winding up the main spring K through the arm J and the sleeve H to which the arm J is rigidly secured. is about completed, the tailpieceof the dog 0 strikes the shoulder 11- on the face-plate G, tripping the dog and withdrawing it from engagement with the pawl N, which pawl springs outwardly back of one of the ratchet-shoulders 2' of the cog-wheel I, as shown in Fig. 5. The pawl N being released-from the dog 0 is now entirely beyond the control of the operator and is under the control of the main spring K, which, through the sleeve H, arm J and pawl N, turns the cog-wheel I in the direction in which the hands of a clock move,

looking at the cog-wheel from the inner side of the door A, as shown in Fig. 5. The handle being released by the operator, the handleshaft is turned backward by the spring D, causing the dog 0 to strike against and follow the pawl N, as shown in Fig. 6. This movement continues until the ratchet-shoulder i and the arm J both engage with the stop P, and the tail of dog 0 engages the spring Z when the parts come to rest, as shown in Fig. 2. The handle when released is not allowed to at once resume its normal position, but the dog 0 strikes the pawl N and arrests the return movement of the handle, permitting the cutout switch to be locked by the box mechanism,

as will be understood, before the stud F" is.

again thrown forward. The rotation of the cog-wheel I operates the bell-hammer and sounds an alarm. It will be seen that the cog-wheel I has a movement only in one direction, and that it does not begin to move until after the mechanism which is wound up by turning the handle is tripped and released from the handle so as to be beyond the control of the operator working the handle. When the dog 0 releases the pawl N by engagement with the shoulder n, the point of the pawl N has passed a short distance beyond the ratchet-shoulder i, and when-released springs forward and strikes the ratchet-shoulder. In doing this, the tailpiece j of the pawl N passes the point of the dog 0, and forces the pawl outwardly with a positive movement, so that if the spring j should not be effective the parts will still operate.

Q is a lever pivoted on the rear side of the face-plate Gand drawn upwardly bya spring 0. The lever Q has a finger Q, projecting through the face-plate G and engaging with the pull-hook a of the box. Three pins 19 on the cog-wheel I strike-the free end of the lever Q and force it downwardly until the pin clears Then this movement tion of rest of the parts the finger Q is in its elevated position, and one of the pins 1) is in contact with the end of the lever Q, as shown in Figs. 2, 3, and 5. The depressed position of the lever is shown in Fig. 6.

The cover B, Fig. 1, may be used to cover the exposed parts of the mechanism. This cover is provided with a slot q, through which thepull-hook a projects ,to engage with the finger Q.

The operation of the parts will be understood from the description already given.

The sequence of operations is as follows: The operator turns the handle as far as the limiting-stops permit, which is one-third'of a revolution. In doing this the switch-stud F is first Withdrawn and afterward the non-interfering stud F. At the same time the dog 0 carries the pawl N around, winding up the main spring K until the dog 0 is tripped, releasing the pawl N. The parts operated by the main spring have now been released from the control of the operating-handle, and returning to their normal position they serve to ring the bell through the rotation of the cog-wheel I and the pallet-wheel L,.and to pull the hook through the movement of the pull-finger Q. The handle being'released by the operator, the non-interfering and switch studs are projected forward again in the order named and the dog 0 again engages with the pawl N. v I

WVhat I claim is- I 1.-- In a keyless fire alarm signal box, the combination with the operating handle of a spring mechanism which is wound up by the movement of the handle, a trip releasing'said spring mechanism from the handle after a definite movement of the handle, and an alarm bell operated by the spring movement after it is released from the operating handle, substantially as set forth.

IIO

2. In a keyless fire alarm signal box, the

combination with the operating handle of a spring mechanism which is wound by the movement of the handle, a trip releasing said spring mechanism from the handle after a definite movement of the handle, and a device for operating the signal mechanism which is moved by said spring mechanism after it is released from the operating handle,sub-

stantially as set forth.

3. In a keyless fire alarm signal box, the combination with the operating handle of a spring mechanism which is wound by the movement of the handle, a trip releasing said spring mechanism from the handle after a definite movement of the handle, an alarm bell at the box, and a device for operating the signal mechanism, both said alarm bell and said signal operating device being worked by the spring mechanism after it is released from the operating handle, substantially as set' forth.

4:- In a keyless fire alarm signal box, the combination with the operating handle, of a pawl driven in one direction by a main-spring,

a dog engaging said pawl and moved by the operating handle for retracting the pawl and winding up the main spring, atripping shoulder disengaging the pawl and dog at the end of a definite movement of the operating handle, and a wheel having ratchet shoulders with which said pawl engages, the movement combination with the main-wheel I, having ratchet shoulders i, of the arm J, the mainspring connected with said arm, the arm 70 moved by the handle, the pawl N, dog 0, and stgp P, substantially as set forth.

In a keyless fire alarm signal box, the combination with the main-wheel I, having a movement in one direction, of the spring lever Q and finger Q for pulling the hook of the signaling mechanism, saidlever and finger being operated by pins on the main-wheel, substantially as set forth.

8. In a keyless fire alarm signal box, the combination with the handle shaft 0 of the sleeve I-I, cog-wheel I, arm J, main-spring K, pallet wheel and bell-hammer pallet L L, arm

k, pawl N, dog 0 and stop P, substantially as set forth.

9. In a keyless fire alarm signal box, the combination with the cutout switch of the box, of the operating handle, and a stud withdrawn by the movement of the operating handle and co-operating with the cutout switch, substantially as set forth.

10. In a keyless fire alarm signal box, the combination with the operating handle of studs operating the cut-out switch and noninterfering devices of the box, said studs being withdrawn successively by the movement of the operating handle, substantially as set forth.

11. In a keyless fire alarm signal box, the combination with the operating handle and its shaft moved in one direction by a spring, of a cam upon said shaft, levers engaging said cam in succession, and switch and non-interfering studs worked by said levers, substantially as set forth.

12. In a keyless fire alarm signal box, the combination with the operating handle of a spring mechanism which is wound and tripped by the movement of said handle, a device operating the signaling mechanism and an alarm bell worked by said spring mechanism after being released from the handle, and switch and non-interfering studs which are withdrawn by the movement of the handle before said spring mechanism is released, substantially as set forth.

This specification signed and witnessed this 6th day of March, 1895.

NATHAN H. SUREN. 

